The Space Weather Prediction Center issued a statement that this Halloween, Earth could experience a “G1 Minor Geomagnetic Storm.” Due to this week’s solar activity, it could disrupt radio signals, GPS, and some electronic systems. And it wouldn’t be a first for trick-or-treaters. On Halloween in 2003, a similar nightmare occurred. On that night, exactly 10 years ago, the largest geomagnetic storm in 50 years hit Earth creating green phantom “northern lights” as far south as Texas and Florida and affected systems from here to the International Space Station.